Campylobacter is oxidase positive and catalase negative.

Diagnosis of typhoid fever during the first several days of illness is confirmed best by culturing:

Agar media that is selective for the Vibrios:

What would be the expected appearance of the colonies on EMB?

Salmonella is distinguished from Citrobacter because Salmonella is:

An organism from a sputum culture grew SBA and chocolate agar plate after 72 hours, tiny pale staining GNCB. The organism was oxidase, urease and nitrate positive. What is the most likely identification of the potential agent of bioterrorism?

QUESTIONS 53-55 REFER TO THE FOLLOWING INFORMATION:An isolate from a stool culture produced the following results: MacConkey: Colorless Citrate: Positive TSI: K/A H2S+ Hektoen: Blue/ Black centers Lysine: Positive Indole – What is the most likely pathogen?

Which antigens are detected when serotyping for Shigella?

Observe the following Salmonella serotyping results and determine the most likely species.                                                           Antisera   Before boiling:    Polyvalent        Vi              Group D                        –                   +                  –   After boiling:       Polyvalent        Vi              Group D                                              +                  —                  +  

Gastritis may be caused by Helicobacter and Plesiomonas.